MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains numerous external URIs and links to compromised CMS uploads, indicating it's part of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload. The file's structure and numerous links point towards a tactic of distributing further malicious content through a network of compromised sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9929
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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Embedded URL info EMBEDDED_URLOne or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.URL https://cructi.ru/uplcv?utm_term=delineamento+em+quadrado+latino+pdf
- http://synhbio.com/upload/files/70530319106.pdf
- http://kindergartenhelden.at/upload/file/nadikopalu.pdf
- http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/pepav.pdf
- http://hp-cnc.de/uploads/files/torutubajawa.pdf
- https://taiyotech.jp/userfiles/file/dovetof.pdf
- http://mudrkanuch.sk/editor_uploads/system/files/19885336497.pdf
- https://pellevah.com/upload/files/wenajur.pdf
- http://flexa.cz/docs/file/78547231821.pdf
- https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/gmq5hqklkgr3llojigk5cb6mcm/24263892536.pdf
- http://gostinica-domodedovo.ru/files/bofexa.pdf
- https://777mto.org/contents/files/muselul.pdf
- https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/08ecee98ba9a66fea6c7f8498e1127f8/kupevew.pdf
- https://doanhnghiepvietnam.org/img_duhoc/files/38136802159.pdf
- http://npi-management.org/ressource/site-image/files/lowegunifizifim.pdf
- http://andreaslasnik.com/data/files/vizomerogejifif.pdf
- http://ssaisarang.com/ckfinder/userfiles/files/mozaveve.pdf
- http://a-kamen.com/userfiles/file/99572206245.pdf
- http://avsa.org/sites/default/files/images/files/wigozitebikazomum.pdf
- http://www.smartlandgroup.com/ckfinder/userfiles/files/xigubevij.pdf
- https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/53387f583b47c258a39c6d274c8c0f65/masovadolutozi.pdf
- http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d26764caf1f---pabipaxovobobev.pdf
- http://nwhouse.ru/uploads/file/nizafifonugu.pdf
- https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e443923e2f8---pufurekod.pdf
- https://angelsstaff.com/uploads/file/vopelof.pdf
- http://brnc85.com/clients/878796/File/45056405627.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off000100ca.bin7a29871a76805923f7f5b9ed58f74655229725b9e6eb74043a646f09846ebbdf |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x100CA | 10736 bytes |
font_01_sfnt_off00011924.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11924 | 16792 bytes |
font_02_sfnt_off00013136.bin8cd9edbeca0753dad7878161a82ae3840c9bc367f31c3cf2662308efe555b15d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13136 | 21412 bytes |
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